Persistent Drop Shadow After Deleting Effect

I’m working on drafting out a tutorial for a complex process which involves highlighting buttons on the page with a drop-shadow effect to cause a glow on them.
My problem is that after I duplicate that frame and remove the drop-shadow/glow effect from the button, it removes it at first but is reapplied when I either change something else on the frame or when I close the document and come back. So there’s no real way to remove the glow effect on a button once I’ve applied it to one and duplicated it…
This is very frustrating and would appreciate any help in how to possibly resolve this!